Formalities

Hello DHE, Today i was praying with my mum at the Buddha's temple in Da nang and saw some tourist who had also visited, while praying, some of these tourists kept talking loudly and disturbing other people meditation.

Hello DHE, Sometimes when i go around Da nang or sometimes in Hoi An, the motorbike people won't stop telling me to come over. I don't want to be rude, how do i tell them No politely or what is the best way to say No in Vietnamese?